What causes damage (equipment wear) in Dark Souls?

Ok, I actually do know what causes equipment wear in Dark Souls. What I actually mean is a bit more specific.
Note: Before I start, I don't know the actual figures, but I do know there is a difference. However, the question isn't about those details (though it wouldn't hurt to include them in your answer).
So: when you hit an enemy, it does an amount of damage (or wear) to your equipment. Let's say it's a 1:1 - 1 hit = 1 point of equipment damage. However when you hit a wall or other object, it does more. Let's say it's a 1:2 - 1 hit = 2 points of equipment damage.
Now, there are a couple of situations here that I am uncertain of, and my only previous knowledge comes from the word of a friend, with no real backup evidence - I just went with it.
When you hit an enemy in a tight corridor, your weapon can either 1. pass through the wall (leaving a trail of sparks), or 2. hit it and rebound, at the same time it hits the enemy hitbox.
Your weapon passes through the wall (with a trial of sparks and hit sound effects) and hits the enemy - does it count as hitting the wall, and how much equipment damage is caused?
Your weapon hits the wall and bounces off (with a resounding ding) but still causes damage to the enemy - does it count as hitting the wall, and how much equipment damage is caused?
The last point I wanted to ask is does this apply to breakable props as well (I.e. Barrels and furniture etc.) or should I instead just roll through it all?
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Does Dark Souls 1 have durability?
Dark Souls 1 has no durability issues, it would take you weeks of swinging a weapon at a wall or corpse for it to break (excluding low durability weapons).Can your weapons break in Dark Souls?
Weapons, shields and armor will eventually break, if the player tries really really hard to do so, and will lose some of their efficiency. Broken items will not have their durability restored by resting at a bonfire, but must be repaired at the Blacksmith in Firelink Shrine or by casting the Repair sorcery.How do you repair weapons at risk Dark Souls?
After getting the repairbox, you need to go to a bonefire and select the new "Repair Equipment" option. You can then repair any damaged equipment in exchange for souls. You can also repair equipment at any blacksmith. Or use a replacement weapon for the mean time.How does durability work in ds2?
Durability is restored by resting at a bonfire, but a broken item must be repaired first. During combat, the durability of equipped weapons and armor degrades. Weapons degrade when you hit something, armor and rings degrade when you are hit.Equipment, Scaling, Poise, \u0026 Equip Load - Dark Souls Remastered Beginner's Guide (2018) - 08
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